Reenforcing and the like band for expansion-joint strips



1 1,645,743 Oct 927 A. c. FISCHER REENFORCING AND THE LIKE BAND FOR EXPANSION I JOINT STRIPS Filed A1191. 21. 1926 Patented Oct. 18, 1927.

UNITED STATES ALBERT C. FISCHER, CHICAGO, ILLINOIS.

REENFORCING AND THE LIKE BAND FOB EXPANSION-JOINT STRIPS.

Continuation of application Serial No. 113,652, filed June 4, 1926. This application filed August 21, 1926.

, Serial No. 130,687.

This application is a continuation of my application filed June 4, 1926, Serial No. 113,652, for improvement in reenforcing and the like ribs for expansion joint strips.

My present invention relates in general to expansion joints for concrete or the like constructions, or in fact any other construction in which expansion and contraction is to be accounted for, and has particular reference to a reenforcing band for use in combination with preformed expansion joint strips.

The most satisfactory method of installing expansion joints, particularly in concrete roadways, is to use a preformed strip of material, moulded or otherwise made in the proper dimension, usually in lengths of 5 feet and a thickness ranging anywhere from 1 to 2 inches, the width of the strip usually being 4 inches. These strips are made from bituminous or other ductile material, and are subject to a certainamount of warping, due to handling or storing. Then again in warm'temperatures they may become flabby or at least unduly flexible.

As a result of the inherent qualities of the strip it is not always possible, orat least convenient, to install the same so as to de- Velop a straight edge and insure perpendicular alignment when they are set up on edge and when the concrete is poured around the same.-

The primary object of my present 1nvention is to provide means for reenforcmg expansion joint strips so as to retain their preformed shapes, regardless of the conditions to which they are subjected in transportation, storing or in handling. p

The salient features of the present inven- I tion are illustrated by the accompanying drawing, in which Figure 1 is a perspect ve view of a portion of a preformed expansion joint strip illustrating a comblnation of the reenforcing bands.

Figure 2 is a similar vlew but showing a modified form of the band.

Figure 3 is a longitudinal VBi'tlCZthSGCtiOII of the form of the invention shown 1n Figure 2.

Figure 4c is a perspective view of a portion of a preformed expansion joint strip showing another form of reenforcing band.

Figure 5 is a vertical section on the line' 55 of Figure 4.

In the brief description of the figures,

where I have referred to modified forms of the reenforcing band, the'-difference in form is not so much concerned with the band per se as the different ways that the band may be detachably secured to the strip.

According to Figure 1, 5 represents a preformed strip of expansion joint material, the same being ordinarily produced in lengths of 5 feet, in thicknesses ranging between 4 and 1 inch, and usually about 4 inches in depth.

The more or less flexible nature of a strip produced in this way makes it inconvenient to install the same with a straight edge. To overcome this inconvenience and other similar difliculties my invention resides in the combination of a metal band 6, which is preferably produced in widths corresponding to the thickness of the expansion joint strip, and with one of these bands applied to each of the longitudinal edges of the strip for the entire length thereof, so as to reenforce the strip and prevent the same from warping. As an example. in some instances I will simply use some adhesive to detachably secure the bands to the edges of the strip, and very often I simply rely on the normal adhesive properties of the strip itooze into the perforations 7, thus effecting anattachment which will withstand considerable rough usage without dislocating the bands. It may be considered that the band on the opposite edge of the strip in this figure is likewise perforated, or it may be simply adhered without perforations, as explained with reference to. Figure 1.

The effect of using the perforations 7 is more clearly shown in Figure 3, where it will be noticed that the material of the strip when oozing into the perforations 7 produces small knobs, or the like, 8.

As still another means of effecting this attachment I may rely on a multiplicity of irregular tips 9 (see Figure 5), the same resulting from punching, lettering or the like 10 (see Figure 4) in the band 6". This would be a rather convenient method since the lettering 10 may comprise the required notice of patent.

In all forms, however, theidea is to de casion demands, which will usually be after the jointhas been installed in the concreteand the concrete has set around the same. Of course it must be understood that it will be impossible to obtain access to the band on the bottom of the strip after the concrete has been poured, but there is no objection to leaving this band on the strip. If it is desired to save the same it may be removed just before the strip is installed. It would not be well to leave the band on the crown of the strip as traffic would soon dislodge it. Then again it may be detrimental to traflic, so that in every instance it would be removed before the job had been completed.

I claim:

1. In combination, a relatively long and normally flexible preformed strip of bituminous expansion joint material, and means mounted along a longitudinal edge thereof to resist the normal flexing of said strip, comprising a relatively thinmetal band of a width and length corresponding to the thickness and length of the strip, said band engaging the edge of said strip only and leaving the entire area of the strip sides exposed.

2. In combination, a preformed expansion joint strip and a temporary reenforcing band detachably mounted upon a longitudinal edge thereof, said band having perforations in the thickness thereof for the reception of the material of the strip for detachably securing the band to the strip.

ALBERT C. FISCHER. 

